More Outside Gaming
So it looks like some people are experimenting with the concept of using GPS devices to create novel games that involve getting outside to play. GPS Tron is a lightcycle game that's played just as you'd imagine, running around with GPS units to lay down the walls that you try to get the other player to run into. It's obviously very rough, but the core idea looks pretty fun. Ideally you'd combine this with some sort of augmented reality support (see ARQuake for an example).